Display screen or a portion thereof with graphical user interface



FIG. 1 is a front view of a first embodiment of a display screen or portion thereof with graphical user interface showing a new design; and,

FIG. 2 is a front view of a second embodiment thereof.

The broken line showing of a display screen in all views forms no part of the claimed design. 

CLAIM The ornamental design for display screen or portion thereof with graphical user interface, as shown and described. 